What is the difference between DC motor and AC motor for water pump
Difference between DC motor and AC motor
There are many kinds of water pumps, including small water pumps such as fish tanks and water purifiers, as well as water pumps for automobiles, industry, and irrigation. The common ones can be divided into DC motors for water pumps and AC motors for water pumps.
1. Different input power supply: DC motor for water pump inputs DC power supply, while AC motor for water pump inputs AC power supply, which is divided into single-phase and three-phase.
2. Different working principles: AC motor power supply voltage adopts AC power, enters stator winding, generates rotating magnetic field in the air gap between stator and rotor, generates induced current in rotor winding, so that the rotor is forced to operate in the stator magnetic field; DC motor power supply voltage is DC input, commonly used technology is used for control, can be infinitely adjusted speed, the number of stages can be adjusted arbitrarily, feedback signals can be added, closed-loop speed regulation can be achieved, and rapid braking is possible, which has relatively better output stability.
3. Different motor structures: DC motor has simple principle and complex structure; AC motor has complex principle and simple structure.
4. Different uses: The speed regulation range of DC motors for water pumps is relatively wide, while the speed regulation range of AC motors for water pumps is relatively small.
5. Different output power: Relatively speaking, the power of DC motors for water pumps is smaller than that of AC motors, especially brushless motors, which can solve many shortcomings of brushed motors.
6. Commutator: DC motors usually have commutators, while AC motors do not.
